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(11)

EP 3 359 998 A1

(12)

(43) Date of publication: 15.08.2018 Bulletin 2018/33 (21) Application number: 16822330.3 (22) Date of filing: 14.12.2016

(51) International Patent Classification (IPC):  G02B 27/00(2006.01) G02B 27/28(2006.01) G02B 27/01(2006.01) G02B 27/10(2006.01) (86) International application number: PCT/US2016/066429 (87) International publication number: WO 2017/112465 (29.06.2017 Gazette 2017/26)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 21.12.2015 US 201514977603 (71) Applicant: Microsoft Technology Licensing, LLC Redmond, Washington 98052-6399 (US)

(72) Inventors: VALLIUS, Tuomas Heikki Sakari Redmond, Washington 98052-6399 (US) WALL, Richard Andrew Redmond, Washington 98052-6399 (US) PIETILA, Pasi Petteri Redmond, Washington 98052-6399 (US) POON, Yarn Chee Redmond, Washington 98052-6399 (US) NGUYEN, Ian Anh Redmond, Washington 98052-6399 (US) WU, Jeb Redmond, Washington 98052-6399 (US) (74) Representative: CMS Cameron McKenna Nabarro Olswang LLP  Cannon Place 78 Cannon Street London EC4N 6AF London EC4N 6AF (GB)